Pressure-controlling valve.



PATENTED JULY 24, 1906.

T. M. WILKINS. PRESSURE GONTROLLING VALVE. APPLIOATION FILED D110. 5.1904. RENEW ED MAY 1.1906.

Wm/155555.- www:

I .To all whom it may concern:

stant made to pass through a THOMAS WILKINS, 0E SEATTLE,

PATENT OFFICE.

WASHINGTON, ASSIGNOR TO AUTO- MATIC BOILER FEED COMPANY.

Specification of Letters Patent.

" Pla.Essulila-ctoN-rrioln;mel VALVE.

Appunto manmmbef 5, leoaagmednyl, 190s. serial 116,314,688.

A'Be it known that I, THOMAS M. WILKINs, a citizen of the United States,residing at Seattle, in the county-of King and State of ashington,haveinvented certain' new and useful Im rovements in Pressure-ControllingValves, owhich the following is a specification, reference being hadtherein to the accom anying drawing.

'-.Tliie object of this invention is to provide a sim le and inexpensivemeans or apparatus gor sensitivel Aand reliably regulating the openingand c osin opposing action of two o uids for the purpose maintaining oneof these fluids at a c011- ressure or at a pressure relative to that othe other fluid.

. The several features the advanta es `arising from their use conointlyor ot erwise will appear in the'v folowing description,4 taken inconnection with the accompanying drawing, which shows la verticalvsectional view-"of trolling devices therefor embodying my inventlon. f

The numeral 2 represents a valve-.casing provided, as 'usua with aninlet-opening 3 and a discharge-opening 4 and having an intermediatevalve seat 5. A registering valve 6 is provided stem 7, which extendsinto a cylinder 8, I'igidlly secured to the said casing in an suitabemanner, as bprovidjng a screw-t readed neck 9 upon t e latter, which enages in corresponding threads formed in the ottorn head 8 ofthecylinder. Communication is made between the inside of this cylinder andthe chamber 2 of said c by a passa e 10,I extendin through theconnecting-nec Projecting t ough the top head 8 of the cylinder 1s anexternallyscrew'- threaded tube 11 and which may advantageously beushing 12. y Interposed between and fixedly connected to the valve-stemand the said tube is an accordion-shaped member 13, which is comprisedof a lurality of resilient circular plates or dap agms 14, severally`connected 1n cou les at thein'peripheries and in proximity f their axes,as shown. e upper end of this tube is connected by a union-f1tting15,preferably with a conducting-pipe which is desirably provided with acock 16, and the sleeve of the invention and of a valve by the greaterdiameter than that of 'a valve and con-'fpo'rt1on of the valve-stem,thus for this seat and has a the fluid under the piston 15 of one of theunion parte l may be used to fuliil the'unction of a jamnut in locking ahandle 17 to the said tube, this handle being provided with an aperturedhub or boss v17, having an internal `screw-thread similarto that uponsaid tube.'

A 1am-nut -18 is provided to act with lsaid bushing for securin the tubeagainst rotation after the same as been turned to properly adjust thelength normally of the member 13, and this nut mayalso be used forcompressing a packing-gasket 19, seated in a recess of said bushing, inorder to make a nonleakable 'oint thereat.

he valve illustrated is of those with which I amacquanted best suitedfor ca g out my invention; but I wish it to be un erstood that I do notlimit myself to its use alone. This valve illustrated comprises,inaddition h 20, mtegra y connected thereto by a shank 2 1, having anaxial bore 21 the inclosed providing 'an annular passage-way extendingthe entire length o `the valve and its piston. The piston 1s aperturedat 22,'and downwardl protruding marginal flanges 22 are several yprovided or these apertures. l23 is a coverplate secured to the lowerend of the said valve-stem, as by a screw 23. Upon this stemat adistance slightly greater than the len th of the aforementioned bore 2is a co ar 24, also of greater diameter than the said bore. Acylindrical bore 25 is provided in the case 2 for the reception of thesaid piston. i It is obvious from the construction of the describedvalve and its o erative parts that it will be seated when t e stem 7thereof is depressed and in so doing removes the cover-plate 23 from thea ertures 22 during the downward travel o the valve while escapes intothe dlscharge-opening 4.` The valve-stem, however, in being raisedthrough the distension of the bellows member 13 rst draws thecoverlateto close the apertures of the piston an removes the collar 24from the .mouth of the bore, and thereby admits the fluid through thelatter to beneath the iston, where it acts to oppose the downwarpressure of the steam be easily raised from its seat.

The operation of the controlling apparatus Patented July 24,1906.

of somewhat to t e valvlproper, (designated by 6,) a piston Y yIn such aservice the valve will be best understood from description of a speciiica plication of the invention for regulating t e feed-pump according totherequned duty. inlet-.opening 3 would be connected bya p ipe26 withthe sourcev of steam-supply and the dischargeo eningv 4 b a i e 27 withthe steam-chest ogthepum rwhrille) the pipe would be connected wit thepipe. Steam is a 'tted under full boilerpressure through:4 thepassage-way aforementioned into the cylinder 8' and actscontinuously uon the outer surface of the bellows 13 an tends to collapse `the same toelevate the valve from its seat and admit '-H'steam 4to actuate thepump. The internal pressure of the water upon the bellowsacts to furtherexpand the same to close the valvel and make the pump ino erative. Thelength of the bellows is regullaitedI by first closing the cock 16,disconnecting the parts of the ,union and withdrawing the jam-nut 18-from the bush-piece 12, when the tube 11 can be turned with the handle17 to screw the same inwardly or outwardly of the casing 8 andregulatethe extension of the bellows so that it will be capable under the actionof the opposing external steam'and in ternal water ressures to meetvconditions. l'he adjustment being attained, the various disconnectedparts arereturned to their former positions andthe device is ready foroperatlon.

The advantages, among others, of' the casing, of a cylindercommunicativelyconadmission of steam to a boiler umps water dischargethe requirednected with said valve-casing a bellows mem- 5o berpositioned interiorl oi said cylinder,

mechanical connection etween'. saidzvalve and the bellows, and a tubecommunicating with the interiorof the bellows and extending outwardlythrough the cylinder, substantially as described'.

2. The combination with a valve and its casing, ofl a cylindercommunicativelfyT connected withsaidcasing, abellows member positionedwithin said cylinder and connected to said valve by astem, anadjusting-tube communicatively connected tothe said bellows, and meansto secure the said tube at any s et position, substantially asdescribed;

3. rI`he combination'with avalve, a casingfor said valve,a-.valve-'stenrcomlected toaA bellows, said bellows which is ositionedinternally of a cylinder, said cy inder, an ex*y ternall -screw-threadedtubel connectedt0- the be lows-and extending, throughascrewthreadedaperture of the cylinderehead, an.

adusting andle on. said tube,- and a jamnut for locking the said tube inafset' position, substantially as described.

4. In a-device of' the'characterdescr'ibed the combination with avalve-andritsfcasing.,

of a bellows, astem connecting"saidvalve and bellows, and a tube makingcommunicative `connection -with the bellowsandiadapted to be connectedwith the"water-discharge pipe of: a pump, substantially as described;

5. Ina device offthecharacterdescribed,

the combination with a-valveandits casing,

of a cylinder mounted on saidcasing, abe

lows arranged within said cylinder, erstem-4 connected to the valve-andextend' into the cylinder and connectedatosaid belowsg.

an adjustable tubecommunicativellyr con* nected to the bellowsfandextending 't in its adjusted positions In testimony whereof I: alx mysignature:

in .presence of. two witnesses.

THOMAS M. WIIKINS: Witnesses: 1

PIERRE BARNES,4

DAVID D. (Bomann...-v

oughz the headof'the cylinderft'o extendl'oricontract the bellows,- andmeans for' loclring the tubel

